What cellphones can teach you about building your business

Entrepreneurs can learn a lot from the development of cellphones over the last several years, David Strom writes. For example, it's important to remember not all of your customers will be technologically savvy, he writes. "Just because brilliant engineers from Stanford or MIT design your product doesn't mean that everyone who will actually use it has that kind of training," he writes. Also, you should try to keep your approach to pricing strategy simple.